import { makeParams, blobValidate } from "@/utils/ruoyi";
import { saveAs } from 'file-saver'
import { Message, Loading } from 'element-ui'

let downloadLoadingInstance;

// 通用下载方法
export default function download(axios) {
  return function(url, params, filename, config){
    downloadLoadingInstance = Loading.service({ text: "正在下载数据，请稍候", spinner: "el-icon-loading", background: "rgba(0, 0, 0, 0.7)", })
    return axios.post(url, params, {
      transformRequest: [(params) => { return makeParams(params) }],
      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
      responseType: 'blob',
      ...config
    }).then(async (data) => {
      const isBlob = blobValidate(data);
      if (isBlob) {
        const blob = new Blob([data])
        saveAs(blob, filename)
      } else {
        const resText = await data.text();
        const rspObj = JSON.parse(resText);
        const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
        Message.error(errMsg);
      }
      downloadLoadingInstance.close();
    }).catch((r) => {
      console.error(r)
      Message.error('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close();
    })
  }
}